@aws-amplify/ui/dist/esm/utils/classNames.mjs

`@aws-amplify/ui` contains low-level logic & styles for stand-alone usage or re-use in framework-specific implementations.

import { isString, isObject, has } from './utils.mjs';

const classNames = (...args) => {
    const classes = [];
    for (const arg of args) {
        // skip falsey values
        if (!arg) {
            continue;
        }
        if (isString(arg)) {
            classes.push(arg);
            continue;
        }
        if (typeof arg === 'number') {
            classes.push(arg.toString());
            continue;
        }
        if (Array.isArray(arg)) {
            classes.push(classNames(...arg));
            continue;
        }
        if (isObject(arg)) {
            // check if the object has a valid .toString() method
            if (arg.toString !== Object.prototype.toString &&
                arg.toString() !== '[object Object]') {
                classes.push(arg.toString());
                continue;
            }
            for (const key in arg) {
                if (has(arg, key) && arg[key]) {
                    classes.push(key);
                }
            }
        }
    }
    return classes.join(' ');
};

export { classNames };